Grinding and finishing machine



c. T. ROTTLER GRINDINCT AND FINISHING MACHINE Filed Dec. 28. 1925 Sheets-Sheet 2 3 Sheets-Sheet 5 March 6, 1928.

` C T ROTTLER GRINDING AND FIINISHING MACHINE Filed Dec. 28. 1925 Patented Mar. 6, 1928.

UNITED STA TES ln'rr.N'rV OFFICE.

CLARENCE T. ROTTLER, OF SEATTLE, YVASBIIIGHION.

@BINDING `AND A IN'ISHING MACHINE.

Application meu December 2s, 1925. serial no. 78,037.

videV a simpleV and inexpensive grinding machine which is also adaptable to hold a tool so that the object to be ground, or any otherv object may be first turned to the correct size.` Another object of the invention is to provide a simple and inexpensive grinding machine in which a plurality of speeds are provided for thework to he ground.`

A further object of kthe invention is to i provide a grinding machinegin which the grinding Wheel is positively and eccentrically heldv in a sliding head.y

A still further object of the invention is to provide a simple andeflicient automatic feed for the `said grinding Wheel.

This machineis an improvement over the machine shown in my prior application, which was filed April 7,1925, with the Serial Number 21,261of1whieh this case isa continuation in part, inthat a single motor is used todrive'boththe, object to be ground andthe grinding wheel,` .and special grinding mechanism is provided to drive both devices from `the same motor with two Ispeeds for .the object "to be groundA and a special automatic feed for the grindingwheel.-

VVit-h these ends in view, the invention embodies a grinding wheel, eccentric'ally held in a sliding head, and means for holding an object to be ground, so that it may beengaged by the said Wheel, and other means for rotating the said object with a plurality of speeds. Means is also provided for-holding a tool for finishing the said object, and a gear pump is provided for supplying a liquid to the grinding Wheel. Other means Y are also provided for adjusting and feeding the said grinding Wheel.

Other features and advantages ofthe in# vention will appear from the following description taken in `connection `vvith the drawings, Wherein j Figure 41 is a crosssection on line 2-p-2of .'Figure 2;

Figure 2 1s a sideuelevationswithla part of the grinding Wheel cover broken away and a part of the body broken away `to showv the multiple speed operating mechanism.

Figure 3 is a detail shovvingthe lever for operating the multiple speed mechanism.

Figure 4 isa sectional vien1 showing the grinding Wheel removed and the means' for holdinga tool Vfor turning an object held in the machine. i

Figure 5 is va sectional plan on a somewhat enlarged scale showing the tool holding means. l

Figure 6 isa section on line 6-6 of Fig ure 1, Withvparts removed.`

In the drawings I have. shown my machine as it Would be niade, wherein-numeral 1 indicates the body Aof, the machine, numeral 2 Ithe head, and numeral Slthe ymotor by Which it is driven. It is understood .how-

. everpthat although a motor is shown and de- .tion 5, and an outwardly extending Web 6 having a tail stock T mounted therein. The tail. stock 7 Amay be `of any suitable design or arrangement, provided it has an ad'ustable center in line with the main shafit or spindle of the machine.

The main shaft, or spindle,` which is in-V dicated by the numeral 8 is'rotatably mounted .iin the body of the machine and provided with a chuck 9, having a tapering outer surface 10, and a key 11, upon which a piston as indicated by the numeral 12 may be hel by the center of the tail stoclr?.`

A gear 13 this gear meshes With a pinion 14 on ashaft 15, andthe shaft 15 isv driven `from another shaft `16 through gears 17 and 18, providing one speed, and other gears 19 and 20,.providing adiiferent speed. rllhe gears 17 and19 are `freely mounted upon the'shaft 15, and only rotate with the shaft when desired.- These gears are provided with .teeth 21 and y22 which may be engaged by teeth .23 on a clutch which is operated by a lever 25 with a yoke .26 on its outer end, as shown in Figure 3. `lt will beobserved that the lever is pivotally mounted on the side of the maf chine at the point 27, and provided with pins 28 at its outer end which engage a slot 29, in

is mounted upon the shaft 8, and

the clutch 24 to move the clutch when it is desired to throw the teeth 23 into engagement with the clutch teeth on the gears 17 and 19. It will also be` observed that, the ratio between the gears 17 and 1S, and the gears 19 and 20, is considerably different, so that when the spindle S is driven through 011e pair ot these gears, it will rotate at a ditferent speed than when it is driven through the other pair. The outer end ot the shaft 1G extends beyond thc end of the body of the machine and is provided with a sheave. 3() and a small gear pump 31. The sheave 30 is driven from another sheave 32 on the motor shaft 33 through a belt 34. as shown in Figure 1. The pump 31 is provided with an inlet pipe 35, which may extend to any suitable source of supply, and a discharge pipe 36, which will extend to a point 37, adjacentv the grinding wheel, so that a. continuous stream of water or other liquid will be supplied to the object being ground.

A frame 3S is provided between the body of the machine and the head, and this frame is attached to the body by bolts 39, adjacent one end, and other bolts` 4;() adjacent the opposite end. The upper part of the frame 38 is provided with grooves 12. in which dovetailed projections 113, at the base ofthe head. are slidably held. At the forward end of this frame is a lug t1 in which a bar t5 may be held by a thumb Screw 1G and in the outer end of the bar is a pin 47 which is adjustably held by a screw 18, so that the point of the pin 47 may readily be moved backward or forward, or adjusted to any suitable position tor truing the wheel. It will be observed that this pin may be adjusted to such a position that it will engage the surface of the grinding wheel when truing the wheel.

A rack A19 may be held to the base of the head by screws 50 as shown in Figure 1, and a gear 51 maybe mounted in the frame 38 to mesh with the rack. The gear 51 is mounted on a sleeve with another gear 52 as shown in dotted lines on the lower end of the sleeve, and both gears are rotatably mounted on a .stud as shown. A tubular shaft with a hand wheel 51 on it and a smaller shaft 55 in it is mounted in the 'frame 3S and on thc inner end ot the shaft 53 is a worm 56 that meshes with the gear 52 so that as the hand wheel is rotated the gear 56 will rotate the gear 52, and this gear will in turn rotate the gear 51 and thereby move the head 2 through the track 49. At the inner end of the gear 56 is a bevelled surface upon which another gear 57 is mounted that meshes with a gear 58 on the shaft 8, and is ordinarily free to rotate without turning the gear 56, however it will be observed thatthe outer edge of the gear 57 is engaged bv a washer 59 on the shaft 55, and when the shaft is rotated by a knurled disk on its opposite end it will draw the washer 59 against the gear 57 and thereby lock the gear 57 upon the inclined surface at the end of the gear 5G, as it. will be noted that the outer end of the shaftl 55 is threaded in the outer end of the tubular shaft It: will therefore be possible to move the head by hand through the hand wheel 54 or to move it autouuitically by turning the knurled dish on the outer end of the shaft 55.

'l`he head 2 is formed with a split cylindrical casing, having lugstt) and (t1 at one side. with bolts (i2 passing through the lugs G() and being threaded into the lugsl (l1. so that. as the bolts are screwed inward they will increase the friction on t'h'- inner cylinder, which is indicated by the numeral 63. The grinding wheel spindle, which is indicated by the numeral (31 is eccentrirally located in the inner cylinder Gil, as shown 1n Figure 1. r1`he spindle G-t is rotatably mounted in bearings ($5, and provided with a pulley Gt at one end, by which it is driven from a pulley (i7 ou the motor shaft through a belt GS. The grinding wheel which is' indicated by the numeral (it) is mounted at the opposite end of the spindle, and it will be observed that the distance between the cud of the grinding wheel and the center ot the spindle, 8, upon which the object' to be ground is mounted, may readily be adjusted by turning the inner cylinder G3 in the head 2.

The inner cylinder G3 is brovided with a continuous circle of teeth, as indicated by the numeral 70. and these teeth mesh with a worm 71, on the shaft 72, which is rotatably mounted in a bushing 73, in a hub 74, on the head 2, and the outer end of the shaft 72 is provided with a hand wheel 75 by which it may be rotated. VAt the inner end of the worm 71 is a set screw 7G, having a nut 77 thereon, through which the wear on the end of the worm may readily bc taken up.

A cover as indicated by the numeral 78, may readily be provided to cover the grinding wheel, as shown in Figure 2, and hereinafter described.

At the forward end of the inner cylinder 63 of the head is a flange. 79, having a .slot SO therein, in which a bar S1 may be held by bolts 82. as shown in Figure 1, and at the outer end of the bar is a clamp 83 for holding the cutting tool, as indicated by the numeral 8-1. It will be observed that the position of the cutting tool may readily be adjusted by rotating the inner cylinder of the head by turning the hand wheel 75, and thc cutting tool may readily bc fed across the object to be cut by turning the disc. on the shaft 55, as hereinbefore described.

The motor 3 mounted upon a base 85 which is supported by arms 8G from the body of the machine. The arms` 86 are pivotally attached to the body at points on the center line of the shaft 16, the arm at one end being provided with a pin 87 that tits loo ` into an opening 88 ina lug 89, as shown in Figure 2, and the arm at the opposite end extending ,beyond the face of the machine and being provided with a slotted opening 90, and a handle 91. This arm is held by a pin 92 in a lug 93, and at the outer end oi" the pin is a thumb nut 94 for rigidly holding the arm and motor base in any suitable position. It will be observed that this provides means for adjusting the position of the motor when the position of the rinding wheel spindle 64 or the tool 84 is adjusted.

The motor base is also resiliently held by a spring 95 which is attached to a wheel 96 that is eccentrically mounted at the point 97 on an arm 98. It will be noted-that the inner end of the spring is rigidly attached at the point '99 and the outer end passes around the wheel 96 and is held to it by a set screw 100. A cord V101 from the spring then passes downward and is attached to the motor base at the point 102 as shown in Figure 1. j

The grinding wheel Cover 78 is made with an inner section 103 and a cover plate 104. The section 103 is provided with a hub 105 having al circular groove 10G in it that is rotatably mounted over a member 107 and the member 107 is rigidly attached to the end 79 of the inner member 63 of the head by setscrews 108 as shown in Figure 2. The section 103 is frictionally held by a spring pin 109 which extends outward from the end 79 of the member 63. f

The construction Will be readily understood from the foregoing description. To use the device, a piston, or other object, may be placed in the machine, as shown in Figure 2, and the position of the grinding Wheel may be adjusted so that it will grind the' pistou to the required size, and the machine may then be started. Itl will be noted that the grinding wheel may be automatically fed across the piston, as hereinbefore described, and may then be readily adjusted to again grind the cylinder to any suitable diameter. It will be noted that the eccentric/mounting of the grinding Wheel spindle provides a positively rigid wheel mounting which will insure the same diameter of the object being ground along its entire length.

It will also be noted that by rotating the wheel 7 5 the grinding wheel may be moved away from the object and a cutting tool brought to such a position that a .cut may be taken from the surface of the object. This will be yparticularly useful when it is desired to take a cut from an object to turn it down to a smaller size before grinding as it will be observed that the eut may readily be taken and ythe object may then readily be ground Without removing it from the machine.

Having thus fully described theinventionl what I claim as new and desire to secure by Letters Patent, is

1. A machine of the class described having in combinationa rotary work supporting means, a cylinder having a pivotal axis substantially parallel to that of the Work, arotary grinding tool and a roughening tool carried by said cylinder on opposite sides of its axis so that either tool may be alternatively brought into engagement with the werk, means for axially moving said cylin- `der. and means for rotatably adjusting either tool to alternatively apply the same to the work.

2. A machine of the class described having in combination a rotary supporting means, a. cylinder having a pivotal axis 'substantially parallel to that of te Work, a rotary finishing tool and a traversing tool carried by said cylinder on opposite sides of its axis sothat either tool may be selectively brought into engagement with the work, means for i axially moving said cylinder, means for ro-` tatably adjusting and securing the tools in the tools, means for axially moving said cyly inder, means for rotatably ladjusting and securing the tools in a predetermined position whereby the tools may befselectively applied to the work. j

vAl. In combination with a. machine ot the class described, a base having an integral tail-stock extending therefrom, a j rotary work support mounted on saidV base and in substantiallyy axial alignment with said tailstock, a member having a pivotal axis substantially parallel to that of the work support, a rotary finishing tool and a traversing tool carried by said member on opposite sides of its axis so that either tool may be selectively brought into engagement. with the Work, means for axially moving saidV member, and means for rotatably `and independentlyadjusting either'tool to alternatively apply the same to the Work.

CLARENCE kT. aoTTLEa. 

